Please Help! 1/4a^2=10

a = 6.32  or 2(sqrt 10)  

Step-by-step explanation:

1/4a^2 = 10      

multiply both sides by 4:

a^2 = 40

a = sqrt 40 = 6.32  or 2(sqrt 10)  

definition: a circle is the  set of all points in a plane that are equidistant  from a given  point  called the center of the circle. we use the symbol ⊙ to represent a circle. the a line segment from the center of the circle to  any point  on the circle is a radius of the circle.

step-by-step explanation:

i googled it and this is what i got i don't know how it is. sorry.

the answer is c

hope this !